The crescent moon will be the centerpiece of April's final astronomical event as it bunches up with Venus, Saturn and Mercury ...

In February, stargazers enjoyed a rare occurrence: All seven of Earth's planetary siblings dotted the night sky at once. And ...

The search for Earth-like exoplanets—planets orbiting stars other than our sun—is a central topic in today's planetary research, because extraterrestrial life is most likely to be found there ...